摘要
长沙至赣州高速铁路临近侧穿黄花机场跑道段隧道施工,需对地面沉降进行严格控制。文章选取暗挖法、盾构法、管幕法以及顶管法等四种常见施工方法进行数值模拟分析,对隧道施工过程中的周围岩体应力、塑性区开展情况以及地表沉降的变化计算结果进行对比分析。结果表明,暗挖法施工造成的地表沉降量较大,达到2 cm以上,对于隧道开挖本身以及地表各种建筑物造成较大影响;而盾构法、管幕法以及顶管法施工,能够有效地控制地表沉降量在5 mm以下,能够满足隧道施工及机场运营安全的要求;结合工程造价及技术条件等因素综合考虑,最终推荐该段施工采用管幕法。
For the Changsha-Ganzhou High-speed Railway tunnel section adjacent to the runway of Huanghua Airport,strict surface settlement control is required during construction.In this paper,aiming at four common con⁃struction methods such as mined construction method,shield method,pipe-roof method and pipe jacking method,the calculation results of the stress of surrounding rock mass,the development of plastic zone and the surface settle⁃ment variation during the tunnel construction are compared and analyzed through numerical simulation analysis.The result shows that the surface settlement caused by the mined construction method is the largest with the value more than 2 cm,which has a great impact on the tunnel and surface buildings;regarding the shield method,the pipe roof method and the pipe jacking method,the excavation-induced settlement can be effectively controlled below 5 mm,meeting the tunnel construction and airport operation safety requirements.Considering the factors such as cost and technical conditions,the pipe roof method is finally recommended for the construction of this tunnel section.
作者
杨剑
YANG Jian(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063;National-Local Joint Engineering Research Center of Underwater Tunnelling Technology,Wuhan 430063)
出处
《现代隧道技术》
EI
CSCD
北大核心
2021年第2期118-126,共9页
Modern Tunnelling Technology
关键词
隧道侧穿
沉降
暗挖法
盾构法
管幕法
顶管法
方案比选
数值模拟
Tunnel
Adjacent construction
Settlement
Mined method
Shield method
Pipe roof method
Pipe jack⁃ing method
Scheme comparison and selection
Numerical simulation
